Respuesta :
if 2 lines are perpendicular then the product of their slopes will be -1
so 2/5 * m = -1 where m is the slope of the line
m = -1 / 2/5 = -5/2
It's C
so 2/5 * m = -1 where m is the slope of the line
m = -1 / 2/5 = -5/2
It's C